Round solid concrete pile body strain monitoring method based on FBG sensor

A concrete pile and strain monitoring technology, which is applied in the direction of foundation structure test, instrument, measuring device, etc., can solve the problem of affecting the integrity and strength of circular solid concrete piles, complex installation and layout of strain gauges, and excessive strain gauge connection lines. Multiple problems, to achieve the effect of flexible layout, saving monitoring costs, and high measurement accuracy

Active Publication Date: 2014-03-26
HOHAI UNIV
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Problems solved by technology

At present, electric strain gauges are mostly used to monitor the strain of circular solid concrete piles. Due to the complicated installation and layout of strain gauges and low survival rate, it is difficult to collect continuous data of pile strain.
At the same time, if too ma

Method used

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  • Round solid concrete pile body strain monitoring method based on FBG sensor
  • Round solid concrete pile body strain monitoring method based on FBG sensor

Examples

Experimental program
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Embodiment

[0023] Embodiment: the circular solid concrete pile of monitoring in the present embodiment is as figure 1 As shown, including a pile body 1, an optical fiber 2 is laid on the outer surface of the pile body 1 along the axial direction of the pile body, and FBG sensors 2-1 are engraved on the optical fiber 2 at equal intervals. like figure 2 As shown, eight optical fibers 2 on the surface of the pile body 1 are laid at equal intervals along the axial direction of the pile body 1 .

[0024] During use, the circular solid concrete pile body strain monitoring method based on the FBG sensor of the present embodiment comprises the following steps:

[0025] 1) The surface of the round solid concrete pile is smoothed. First, sand the surface of the pile body with sandpaper, then apply epoxy resin, and then sand the epoxy resin to make it smooth.

[0026] 2) On the surface of the processed pile body, lay eight optical fibers at equal intervals along the axial direction of the pile b...

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Abstract

The invention discloses a round solid concrete pile body strain monitoring method based on an FBG sensor. The method comprises the steps that smoothness processing is conducted on the surface of a round solid concrete pile body; optical fibers are laid in the axial direction of the surface of the processed pile body, and the FBG sensor connected to the optical fibers in series is bonded to the surface of the pile body; the optical fibers laid on the surface of the pile body are coated with epoxy resin; the ends of the optical fibers are connected into an FBG sensor data acquisition instrument; and the strain value of the pile body is measured. The round solid concrete pile body strain monitoring method based on the FBG sensor has the advantages of being simple in construction and wiring, high in success rate, low in cost, high in precision and the like.

Description

technical field [0001] The invention relates to a test method of a foundation structure, in particular to a method for monitoring the strain of a circular solid concrete pile body based on an FBG sensor. Background technique [0002] The circular solid concrete pile is a widely used pile type. It has the advantages of low production cost, simple construction process, low technical difficulty, small diameter, large specific surface area, and high bearing capacity of unilateral concrete. It is widely used in engineering, industrial and civil construction engineering and other fields. At present, electric strain gauges are mostly used to monitor the strain of circular solid concrete piles. Due to the complicated installation and layout of strain gauges and low survival rate, it is difficult to collect continuous data of pile strain. At the same time, if too many strain gauges are buried in the pile body, multiple strain gauge data lines must be derived along the pile body, whi...

Claims

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Application Information

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IPC IPC(8): E02D33/00G01B11/16
Inventor 高磊金龙余湘娟
Owner HOHAI UNIV
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